CN103676546B - Image processing system - Google Patents
Image processing system Download PDFInfo
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- CN103676546B CN103676546B CN201310389013.8A CN201310389013A CN103676546B CN 103676546 B CN103676546 B CN 103676546B CN 201310389013 A CN201310389013 A CN 201310389013A CN 103676546 B CN103676546 B CN 103676546B
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- registration
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- middle transfer
- colour code
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
- G03G15/0105—Details of unit
- G03G15/0131—Details of unit for transferring a pattern to a second base
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/01—Apparatus for electrographic processes using a charge pattern for producing multicoloured copies
- G03G15/0142—Structure of complete machines
- G03G15/0178—Structure of complete machines using more than one reusable electrographic recording member, e.g. one for every monocolour image
- G03G15/0189—Structure of complete machines using more than one reusable electrographic recording member, e.g. one for every monocolour image primary transfer to an intermediate transfer belt
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
- G03G15/5054—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the characteristics of an intermediate image carrying member or the characteristics of an image on an intermediate image carrying member, e.g. intermediate transfer belt or drum, conveyor belt
- G03G15/5058—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the characteristics of an intermediate image carrying member or the characteristics of an image on an intermediate image carrying member, e.g. intermediate transfer belt or drum, conveyor belt using a test patch
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/01—Apparatus for electrophotographic processes for producing multicoloured copies
- G03G2215/0151—Apparatus for electrophotographic processes for producing multicoloured copies characterised by the technical problem
- G03G2215/0158—Colour registration
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Color Electrophotography (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Control Or Security For Electrophotography (AREA)
Abstract
The present invention relates to image processing system.The rotary speed that intermediate transfer belt (41) is intermediate transfer belt (41) during new product is stored as benchmark rotary speed.In addition, form registration colour code (Rk)～(Ry) and calculate position offset, and position offset when that the calculate position offset according to the rotary speed of intermediate transfer belt (41) is poor with the rotary speed of benchmark rotary speed is modified to state that secondary transfer roller (42) contacts with intermediate transfer belt (41).It follows that based on revised position offset, revise the writing position of the electrostatic latent image carried out by exposure device (60K)～(60Y).Thus, it is not necessary to many time just can perform to consider the registration correction that the rotary speed of the intermediate transfer belt (41) of the state of state and the separation making secondary transfer roller (42) contact with intermediate transfer belt (41) is poor accurately with toner.
Description
Technical field
The present invention relates to image processing system, more specifically, particularly relate on middle transfer body
Form the registration colour code of each color, and detect the registration colour code of each color formed, based on this inspection
Survey the image processing system that result carries out the color displacement correction of coloured image.
Background technology
Such as, in the color image forming device of tandem type, it is arranged with along intermediate transfer belt with sense
Body of light drum, transfer implement are the image-generating unit of each color of core, in each image-generating unit, photosensitive
Body drum is exposed scanning by the laser beam from laser diode, thus forms sub-image, this sub-image
It is developed by toner and forms toner image.Then, these toner images are the most once
Being transferred on intermediate transfer belt, each color toner picture after primary transfer is on secondary transfer position
It is secondarily transferred in the lump by intermediate transfer belt and the secondary transfer printing of the state rotation to contact
On paper between roller.
In such color image forming device, exist because of photoconductor drum, intermediate transfer belt, two
The deterioration in time of secondary transfer roll etc., the variation etc. of the humiture of device periphery, and the exposure of laser beam
Optical position produces skew etc. according to each color, thus produces the situation of color displacement, in order to prevent this
The situation of kind, in most cases performs color displacement correction.Color displacement fixed case is revised if any registration,
It forms the registration colour code (resist being made up of the toner image of each color on intermediate transfer belt
Patch), the position skew of each color is detected according to the forming position of the registration colour code of each color
Amount, with correction map as writing position.
Carry out registration revise in the case of, if secondary transfer roller contacts with intermediate transfer belt, then in
Between registration colour code in transfer belt be attached to roller surface in secondary transfer roller and be contaminated, due to this
Roller surface is contaminated, and causes when image is formed, and the back side of paper is also contaminated.Therefore,
In the past, it was configured to secondary transfer roller be contacting and separating freely with intermediate transfer belt, was entering
When row registration is revised, carry out the control making secondary transfer roller separate from intermediate transfer belt.
But, if intermediate transfer belt and make coefficient of friction driving roller that it rotates drop because of use
Low, then when making secondary transfer roller contact with intermediate transfer belt and when separating, the rotation of intermediate transfer belt
Rotary speed produces difference.Therefore, the image formation and the registration that perform reality under different conditions are repaiied
Just, thus produce can not revise color displacement accurately problem.It is also contemplated for improving middle turning
The belt tension of print band, when making secondary transfer roller contact with intermediate transfer belt and the intermediate transfer in the time of separation
The constant airspeed of band, if but improve belt tension, then produce the problem such as rupture of intermediate transfer belt.
It is thus possible, for instance there has been one making secondary disclosed in Japanese Unexamined Patent Publication 2009-47741 publication
Form registration colour code under state that transfer roll contacts with intermediate transfer belt and the state that separates, calculate
Make state that secondary transfer roller contacts and the intermediate transfer belt of state that separates with intermediate transfer belt
Rotary speed is poor, with the technology of correction position side-play amount.
In technology disclosed above, even if in the state making secondary transfer roller contact with intermediate transfer belt
Under be also required to form registration colour code, so registration is revised needs more time and toner.
Summary of the invention
Therefore, it is an object of the invention to provide just can high accuracy without many time and toner
Ground performs to consider the state making secondary transfer roller contact and the state separated with middle transfer body
The image processing system that the registration of the rotary speed difference of middle transfer body is revised.
The image processing system of the present invention realizing above-mentioned purpose has: multiple image-generating units, and it passes through
Exposing unit as writing electrostatic latent image in carrying body, is developed this electrostatic latent image by developing cell, system
It is made the toner image of different colors；Rotatable middle transfer body；Primary transfer unit, its
Make above-mentioned as carrying body on the toner image that is made be transferred to above-mentioned middle transfer body；And secondary turns
Print roller, its make the toner image being transferred on above-mentioned middle transfer body be secondarily transferred to be transferred parts and
Rotate freely in the way of separating freely with above-mentioned middle transfer body and to contact, by above-mentioned multiple one-tenth
Form the registration colour code of the position offset detection of toner image as unit, make above-mentioned secondary transfer printing
Roller from the state that above-mentioned middle transfer body separates, above-mentioned registration colour code is transferred to above-mentioned in
Between transfer article, utilize detector unit to detect the registration colour code on above-mentioned middle transfer body, based on detection
Result calculates the position offset of the sub scanning direction of the registration colour code of each color, revises by exposure single
The writing position of the electrostatic latent image of unit's write, above-mentioned image processing system is characterised by possessing:
Memory element, it stores the rotation speed of above-mentioned middle transfer body when above-mentioned middle transfer body is new product
Degree is as benchmark rotary speed；And amending unit, its according to formed above-mentioned registration colour code time upper
The rotary speed stating the rotary speed of middle transfer body and benchmark rotary speed is poor, calculates above-mentioned
Position offset position when being modified to the state that secondary transfer roller contacts with middle transfer body inclined
Shifting amount, based on revised position offset, writing of the electrostatic latent image that correction is write by exposing unit
Enter position.
Here, it is also possible to be set to, it is additionally provided with the temperature detecting unit of temperature in detection device, base
Temperature in the device detected by temperature detecting unit, the benchmark revising middle transfer body rotates
Speed.
It addition, according to the present invention, it is provided that a kind of image processing system, it has: multiple image-generating units,
It, is dived by developing cell this electrostatic that develops as writing electrostatic latent image in carrying body by exposing unit
Picture, is fabricated to the toner image of different colors；Rotatable middle transfer body；Primary transfer list
Unit, its make above-mentioned as carrying body on the toner image that is made be transferred to above-mentioned middle transfer body；And
Secondary transfer roller, it makes the toner image being transferred on above-mentioned middle transfer body be secondarily transferred to be transferred
Parts and rotating freely in the way of separating freely with above-mentioned middle transfer body and to contact, by above-mentioned
Multiple image-generating units form the registration colour code of the position offset detection of toner image, make above-mentioned two
Above-mentioned registration colour code, from the state that above-mentioned middle transfer body separates, is transferred to by secondary transfer roll
Above-mentioned middle transfer body, utilizes detector unit to detect the registration colour code on above-mentioned middle transfer body, base
Calculate the position offset of sub scanning direction of the registration colour code of each color in testing result, revise by
The writing position of the electrostatic latent image of exposing unit write, it is characterized in that of above-mentioned image processing system,
Possessing: memory element, it stores when above-mentioned middle transfer body is new product, from by above-mentioned exposure list
Unit writes the write of above-mentioned registration colour code in above-mentioned picture carrying body and has started to by above-mentioned detection list
Unit detects that the time till the registration colour code on above-mentioned middle transfer body is as fiducial time；And
Amending unit, its position offset detection process in, according to from by above-mentioned exposing unit to above-mentioned picture
The write writing above-mentioned registration colour code in carrying body has started to by above-mentioned detector unit to detect
State the time till the registration colour code on middle transfer body and the time difference of said reference time, by upper
State the position offset calculated when being modified to the state that secondary transfer roller contacts with middle transfer body
Position offset, based on revised position offset, revise by exposing unit write quiet
The writing position of electricity sub-image.
Here, it is also possible to be set to, it is additionally provided with the temperature detecting unit of temperature in detection device, base
In the device detected by temperature detecting unit, temperature is to revise fiducial time.
Furthermore it is preferred that as above-mentioned registration colour code, by the direction of rotation with middle transfer body just
The a plurality of straight line handed over and formed the most at predetermined intervals is constituted, between above-mentioned a plurality of straight line
Every the girth or the divided in equal amounts of girth that are above-mentioned picture carrying body.
In the image processing system of the present invention, it is not necessary to the time of volume and toner, it becomes possible to high
Precision ground performs to consider to make the state that secondary transfer roller contacts and the shape separated with middle transfer body
The registration correction of the rotary speed difference of the middle transfer body of state.
Accompanying drawing explanation
Fig. 1 is the synoptic diagram of an example of the image processing system (photocopier) representing the present invention.
Fig. 2 is the figure of the formation example of the registration colour code representing and being formed at intermediate transfer belt.
Fig. 3 is the shape representing registration colour code when secondary transfer roller is crimped on intermediate transfer belt and when separating
The figure of state.
Fig. 4 is by the flow chart illustration of the correction of position offset.
Description of reference numerals
Ry, Rm, Rc, Rk ... registration colour code；41 ... intermediate transfer belt (middle transfer body)；
42 ... secondary transfer roller；43 ... position offset detection sensor (detector unit)；44 ... temperature passes
Sensor (temperature detecting unit)；50Y, 50M, 50C, 50K ... image-generating unit；51Y、51M、
51C, 51K ... photoconductor drum (as carrying body)；53Y, 53M, 53C, 53K ... developing unit
(developing cell)；54Y, 54M, 54C, 54K ... primary transfer roller；60Y、60M、60C、
60K ... exposure device (exposing unit).
Detailed description of the invention
Hereinafter, the image processing system of the present invention is described based on accompanying drawing, but the present invention does not limit to
In these embodiments.
Fig. 1 is the panchromatic photocopier of tandem type of an example of the image processing system as the present invention
The synoptic diagram of (below, being sometimes denoted as " photocopier ").Below, it is described with reference to the accompanying drawings.
(being monolithically fabricated of photocopier)
The photocopier of Fig. 1 possesses image reading unit 10, image forming part 20 and control portion 100.
Image reading unit 10 is to make scanner 11 move to read on not shown original copy glass plate
The parts of the image of the original copy carried.Obtain by being arranged at the irradiation of the Exposing Lamp of scanner 11
The original image arrived passes through optical system imaging, and by respectively with red (R), green (G), blue
(B) light of three kinds of wavelength is corresponding ccd image sensor 12 and obtain AD conversion, become
Each view data of R, G, B corresponding with original copy.
The view data of obtained each color component is subjected at various data in control portion 100
Manage, and then the color that respectively reproduces being converted into Y, M, C, K (below, closes with each reproduction form and aspect
The numbering of composition part add this Y, M, C, K as subscript) view data.Conversion
After view data be stored in the image storage 100a in control portion 100 according to each reproduction color,
Supply with paper P is synchronously read according to every scan line, becomes and makes photoconductor drum (as load
Carrier) the driving of laser diode (not shown, to be below denoted as " LD ") of 51Y～51K exposure
Dynamic signal.
Image forming part 20 is the parts being formed image by known electronic photo mode, and by
The intermediate transfer portion 40 that sets up intermediate transfer belt (middle transfer body) 41 and formed and with centre
Transfer belt 41 is opposed and rotates from its direction of rotation upstream side (hereinafter referred merely to as " upstream side ") edge
Y that downstream, direction (hereinafter simply referred to as " downstream ") configures at predetermined intervals, M, C,
Image-generating unit 50Y～50K of each color of K is constituted.
In addition, oriented intermediate transfer portion on the transport path of the paper P along arrow B direction
The secondary transfer position of 40 supplies the sheet feeding section 70 of paper P, is arranged in the two of intermediate transfer portion 40
The fixing section 80 in the sheet transport direction downstream of secondary transfer position.
In image-generating unit 50Y～50K of each color of Y, M, C, K, exposure device 60Y～
60K possesses the signal that drives accepted from the output of above-mentioned control portion 100 respectively and produces the LD of laser
(not shown), be used for making this laser to be partial to exposure scan photoconductor drum on main scanning direction
Polygonal mirror (not shown) etc. on 51Y～51K.It addition, image-generating unit 50Y～50K is by feeling
Body of light is roused 51Y～51K, is disposed in charged charger 52Y～52K about, developing unit
53Y～53K, primary transfer roller 54Y～54K and remover 55Y～55K etc. are constituted.
Photoconductor drum 51Y～51K, before accepting above-mentioned exposure, is eliminated device 55Y～55K and removes
The residual toner on surface, by not shown erasing light irradiation after electric eliminating, by charged charging
Device 52Y～52K is the most charged, if by above-mentioned laser when the most charged
Accept exposure, then form electrostatic latent image on the surface of photoconductor drum 51Y～51K.
At developing unit 53Y～53K equipped with containing each color with the toner concentration of regulation respectively
The developing agent of the binary of toner, each electrostatic latent image respectively by each color developing unit 53Y～
53K is with the toner development of each color.Thus, on the surface of photoconductor drum 51Y～51K respectively
Form the toner image of Y, M, C, K, in each transfer position, according to being disposed in middle turning
Print the effect of primary transfer roller 54Y～54K of the rear side with 41, be transferred to successively along arrow
On the intermediate transfer belt 41 that head direction rotates.Now, it is transferred in rotation with the coincidence of this toner image
Intermediate transfer belt 41 on the mode of identical position, stagger towards downstream from upstream side fixed
Time ground perform each color imaging action.
The intermediate transfer belt 41 of the multiple toner image transferred with each color further rotates, with in
Between the opposed secondary transfer roller 42 of transfer belt 41 abut, until it reaches form transfer nip
Position.In the way of Tong Bu with the rotation of intermediate transfer belt 41, paper is supplied to this transfer nip
P, in transfer nip by the toner image of each color transferred by overlap on intermediate transfer belt 41
It is transferred to paper P.Wherein, non-transfer to paper P, but remain on intermediate transfer belt 41
The cleaned scraper plate of toner 49 is removed, is reclaimed.
The paper P of the multiple toner image transferred with each color is transported to fixing along arrow B direction
Portion 80.The fixing roller 81 of fixing section 80 possesses heater H in inside, utilizes control portion 100
Control the energising to heater H.Paper P is fixed roller 81 and at high temperature pressurizes, fixing roller 81
The toner particle on surface be deposited over and be fixed on paper using surface after, be discharged to discharge tray
On 82.
Control portion 100 in addition to carrying out the control of common image formation action as above,
It is also carried out the timing of the Optimization control of image forming conditions, content etc. to control.Specifically, pin
To environmental change, change over etc. and the variation of image quality that causes, always can be formed suitably
The mode of image carry out the Optimization control of image forming conditions.As image forming conditions
One of goodization control, has registration to revise.The control content that following description registration is revised.
Fig. 2 illustrates of the registration colour code during offset detection of position in transfer belt 41 formed between
Individual example.Figure when Fig. 2 is to observe intermediate transfer belt 41 from the arrow A direction of Fig. 1.Such as figure
Shown in 2, registration colour code Rk～Ry is by (with main sweep orthogonal with band direct of travel according to each color
Retouch direction parallel) a plurality of straight line composition.For forming the lettering number of this registration colour code Rk～Ry
According to being pre-stored in memory element 100b, based on these lettering data, pass through image-forming assembly
In 50Y～50K transfer belt formed between 41.When not producing color displacement, join
Quasi-colour code Rk～Ry is formed as each color and gives volume the most in order to a plurality of line part
Number time the identical straight line of this numbering (be in identical position relationship each other) each other, with
With on the direction (sub scanning direction) that direct of travel is parallel, there is distance G each other.
Formation spacing p of each registration colour code Rk～Ry shown in Fig. 2 is set to the week of photoconductor drum
Long 1/4.Additionally, formation spacing p of each registration colour code is not particularly limited, but preferably
Girth or the divided in equal amounts of girth for photoconductor drum.Thereby, it is possible to eliminate by photoconductor drum
Rotary shaft vibrates the impact brought.
The registration colour code being transferred to intermediate transfer belt 41 from photoconductor drum 51Y～51K
Rk～Ry rotates along with intermediate transfer belt 41, and is examined by position offset detection sensor 43 respectively
Surveying, its detection signal is sent to control portion 100.Control portion 100 is according to by position offset detection
The detection signal of sensor 43 detection, on the basis of the position of the registration colour code Rk of K color,
Obtain from detecting that registration colour code Rk starts to registration colour code Rc～Ry detecting other colors
Each time, according to calculated time and time when not producing color displacement
Difference calculate position offset Hy, Hm, Hc of sub scanning direction.Here, for each face
According to being in the line part of identical position relationship position offset each other, color, takes that it is average, but
The calculating of position offset Hy, Hm, Hc itself can use known method.
But, if as it is shown on figure 3, intermediate transfer belt deteriorates in time because of use, then secondary turns
The rotary speed when rotary speed of intermediate transfer belt when print roller separates contacts than secondary transfer roller
Slowly, for from detecting that K color registrates colour code Rk and starts to the registration detecting other colors
For each time till colour code Rc～Ry, the time ratio two of the state that secondary transfer roller separates
The time of the state of secondary transfer roll crimping is long.Therefore, formed according to actual image and registration is revised
Perform under different conditions, thus produce the problem that can not revise color displacement in high precision.
The present inventor etc. find, if making secondary transfer roller in the intermediate transfer belt 41 of new product
The rotation of intermediate transfer belt 41 under 42 states contacted with intermediate transfer belt 41 and separated state
Rotary speed does not produce difference, even and if the intermediate transfer belt 41 that deteriorates in time because of use,
The rotation of intermediate transfer belt 41 when secondary transfer roller 42 contacts with intermediate transfer belt 41
Speed is also almost identical with during new product.Therefore, by intermediate transfer belt 41 be during new product rotation speed
Degree regards as intermediate transfer belt 41 in being continuing with, secondary transfer roller 42 and intermediate transfer belt 41
Contact state time rotary speed (benchmark rotary speed) and be stored in memory element 100b,
Using above-mentioned benchmark rotary speed to calculate makes secondary transfer roller 42 contact with intermediate transfer belt 41
The difference of the rotary speed of the intermediate transfer belt 41 of the state of state and separation, based on the rotation calculated
Rotary speed difference correction position side-play amount.
First, in the present invention, when intermediate transfer belt 41 is new product, by secondary transfer roller
Under 42 separately positioned states, form registration colour code Rk～Ry shown in Fig. 2, inclined by position
Move detection sensor 43, such as, measured by internal timer and carry out from by exposure device 60K
The write of registration colour code Rk start to by position offset detection sensor 43 to detect registration color
Time till mark Rk.And, according to pre-enter, the photoconductor drum of exposure device 60K
Exposure position on 51K is examined to distance, the skew of primary transfer position to position of primary transfer position
The rotary speed of the distance and photoconductor drum 51K of surveying sensor 43 calculates intermediate transfer belt 41
Rotary speed, be stored in memory element 100b as benchmark rotary speed Vb.
Then, in position offset detection processes, benchmark based on intermediate transfer belt 41 rotates speed
Degree Vb and actual rotary speed Vb ' speed difference Δ Vb, revise the position detected inclined
Shifting amount.Fig. 4 shows the example of the flow chart of the content representing position offset detection process.
In this position offset detection processes, first, it is determined that whether intermediate transfer belt 41 is new product
(step S100).Then, in the case of intermediate transfer belt 41 is new product, calculate middle turning
Print benchmark rotary speed Vb(step S110 with 41), it is stored in memory element 100b (step
Rapid S111).
On the other hand, in the case of intermediate transfer belt 41 is not new product (step S100), it is judged that
Whether in-position offset detection period (step S101).As position offset detection period, example
When switching on power such as oriented device, when number of prints reaches regulation number etc..Wherein, this process is
Start when secondary transfer roller 42 is positioned at separation point position.It is positioned in secondary transfer roller 42
During crimping position, control portion 100 starts with process, controls actuator so that it is move to separate
Position.
Next, it is judged that whether the variable quantity of the temperature detected by temperature sensor 44 is in regulation
Amount is above (step S102).This is the secondary transfer roller 42 owing to being sometimes made up of bipeltate etc.
External diameter change according to temperature, when secondary transfer roller 42 crimps with intermediate transfer belt 41 in
Between the rotary speed of transfer belt 41 slightly change, show as color displacement.Change in temperature
In the case of change amount is more than ormal weight, the benchmark rotary speed revising intermediate transfer belt 41 is prevented
Only color displacement (step S103).Wherein, by variable quantity and the correction of rotary speed of temperature
Between relation obtain previously according to experiment etc. and be stored in memory element 100b.
It follows that form registration colour code Rk～Ry(step S104 on intermediate transfer belt 41),
Position offset detection sensor 43 is utilized to detect the registration colour code Rk～Ry(step formed
S105).
Then, the position of each color is calculated according to the testing result of registration colour code Rk～Ry inclined
Shifting amount (step S106).It addition, simultaneously, for registration colour code Rk, internal timer is passed through
Measure the write registrating colour code Rk by exposure device 60K to by position offset detection sensor
43 detect the time till registration colour code Rk, calculate rotary speed Vb of intermediate transfer belt 41 '
(step S107).
Then, according to rotary speed Vb calculated of intermediate transfer belt 41 ' and be stored in and deposit
Benchmark rotary speed Vb in storage unit 100b, obtains the rotary speed difference Δ of intermediate transfer belt
Vb(=Vb-Vb ') (step S108).
It follows that according to rotary speed difference Δ Vb correction position side-play amount Hy, Hm, Hc(step
Rapid S109).Specifically, for Y color, deduct relatively from current position offset Hy
In K color Y color write timing, offset Δ Hy that rotary speed difference Δ Vb causes,
And it is rewritten into the value after subtracting each other.This offset Δ Hy, Δ Hm, Δ Hc can be divided by following formula
Do not obtain.
Δ Hy=Py/ Δ Vb
Δ Hm=Pm/ Δ Vb
Δ Hc=Pc/ Δ Vb
Here, Py, Pm, the Pc in formula is the setting of the photoconductor drum on the basis of K color
Interval (spacing).
Thus, after reason terminates in this place, when performing actual image formation, turn according to by centre
Print with 41 the side-play amount that causes of speed difference be modified after position offset Hm～Hc control
Imaged write timing, it is possible to prevent by the deterioration in time of intermediate transfer belt 41, drastically
The generation of the speed fluctuation of intermediate transfer belt 41 that causes of variations in temperature caused prevent color
Skew.
Additionally, due to by exposure device write registration the colour code rotation by photoconductor drum and quilt
It is delivered to what time in primary transfer portion determined that, so the rotation of intermediate transfer belt can also be replaced
Speed, but use the write from photoconductor drum is carried out by exposing unit registration colour code start to
By position offset detection sensor 43 detect on intermediate transfer belt registration colour code till time
Between, carry out correction position side-play amount.That is, it is in the case of new product, from by exposing by intermediate transfer belt
The write of the registration colour code that photoconductor drum is carried out by light unit has started to by position offset detection
Sensor 43 detects that the time till the registration colour code on intermediate transfer belt is as fiducial time
It is stored in memory element 100b.Then, in position offset detection processes, measure from by exposing
The write of the electro-optical device registration colour code to carrying out on photoconductor drum has started to by position skew inspection
Survey the time till the registration colour code that sensor detects on intermediate transfer belt.Then, will be according to survey
Time and the time difference of said reference time made and the above-mentioned position offset correction calculated
The position offset during state that one-tenth secondary transfer roller contacts with middle transfer body.
Claims (5)
1. an image processing system, it has: multiple image-generating units, and it is existed by exposing unit
As writing electrostatic latent image in carrying body, developed this electrostatic latent image by developing cell, be fabricated to difference
The toner image of color；Rotatable middle transfer body；Primary transfer unit, it makes in institute
State as the toner image being made in carrying body is transferred to described middle transfer body；And secondary transfer printing
Roller, its make the toner image being transferred on described middle transfer body be secondarily transferred to be transferred parts and
Rotate freely in the way of separating freely with described middle transfer body and to contact,
The registration color of the position offset detection of toner image is formed by the plurality of image-generating unit
Mark, when making described secondary transfer roller separate from described middle transfer body, by described registration
Colour code is transferred to described middle transfer body, utilizes detector unit to detect on described middle transfer body
Registration colour code, calculate the position of sub scanning direction of the registration colour code of each color based on testing result
Side-play amount, revises the writing position of the electrostatic latent image write by exposing unit,
Described image processing system is characterised by possessing:
Memory element, it stores the rotation of described middle transfer body when described middle transfer body is new product
Rotary speed is as benchmark rotary speed；
Amending unit, it carries out the rotation according to described middle transfer body during the described registration colour code of formation
In rotary speed and described memory element, the rotary speed of the benchmark rotary speed of storage is poor, by described meter
The position offset calculated is modified to the shape that described secondary transfer roller contacts with described middle transfer body
The position offset correction of position offset during state processes；And
Writing position amending unit, it is based on by the revised position offset of described amending unit,
Revise the writing position of the electrostatic latent image write by exposing unit,
Described amending unit carries out described position offset correction after the correction of said write position
During process, read the described benchmark rotary speed of storage in described memory element and use.
Image processing system the most according to claim 1, it is characterised in that
It is also equipped with detecting the temperature detecting unit of temperature in device, detects based on by temperature detecting unit
Temperature in the device gone out, revises the benchmark rotary speed of middle transfer body.
3. an image processing system, it has: multiple image-generating units, and it is existed by exposing unit
As writing electrostatic latent image in carrying body, developed this electrostatic latent image by developing cell, be fabricated to difference
The toner image of color；Rotatable middle transfer body；Primary transfer unit, it makes in institute
State as the toner image being made in carrying body is transferred to described middle transfer body；And secondary transfer printing
Roller, its make the toner image being transferred on described middle transfer body be secondarily transferred to be transferred parts and
Rotate freely in the way of separating freely with described middle transfer body and to contact,
The registration color of the position offset detection of toner image is formed by the plurality of image-generating unit
Mark, when making described secondary transfer roller separate from described middle transfer body, by described registration
Colour code is transferred to described middle transfer body, utilizes detector unit to detect on described middle transfer body
Registration colour code, calculate the position of sub scanning direction of the registration colour code of each color based on testing result
Side-play amount, revises the writing position of the electrostatic latent image write by exposing unit,
Described image processing system is characterised by possessing:
Memory element, it stores when described middle transfer body is new product, from by described exposing unit
The write writing described registration colour code in described picture carrying body has started to by described detector unit
The time till the registration colour code on described middle transfer body that detects is as fiducial time；
Amending unit, it carries out in position offset detection processes, according to from by described exposing unit
In described picture carrying body, the write of the described registration colour code of write has started to single by described detection
Unit detects in the time till the registration colour code on described middle transfer body and described memory element
The time difference of the described fiducial time of storage, is modified to described by the described position offset calculated
The position skew of the position offset during state that secondary transfer roller contacts with described middle transfer body
Correcting process；And
Writing position amending unit, it is based on by the revised position offset of described amending unit,
Revise the writing position of the electrostatic latent image write by exposing unit,
Described amending unit carries out described position offset correction after the correction of said write position
During process, read and use the described fiducial time of storage in described memory element.
Image processing system the most according to claim 3, it is characterised in that
It is also equipped with detecting the temperature detecting unit of temperature in device, based on by described temperature detecting unit
Temperature in the device detected, revises fiducial time.
5., according to the image processing system described in any one in Claims 1 to 4, its feature exists
In,
Described registration colour code by orthogonal with the direction of rotation of middle transfer body and in a rotational direction with
The a plurality of straight line that predetermined distance is formed is constituted, and the interval of described a plurality of straight line is described picture carrying body
Girth or the divided in equal amounts of girth.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012193462 | 2012-09-03 | ||
| JP2012-193462 | 2012-09-03 |
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| CN201310389013.8A Expired - Fee Related CN103676546B (en) | 2012-09-03 | 2013-08-30 | Image processing system |
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|---|---|
| US (1) | US9411253B2 (en) |
| JP (1) | JP6057134B2 (en) |
| CN (1) | CN103676546B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6661300B2 (en) * | 2015-08-17 | 2020-03-11 | キヤノン株式会社 | Image forming device |
| JP6544266B2 (en) * | 2016-02-25 | 2019-07-17 | コニカミノルタ株式会社 | Image forming apparatus and program |
| JP6691687B2 (en) * | 2016-03-17 | 2020-05-13 | 株式会社リコー | Transfer device and image forming device |
| KR20180077798A (en) * | 2016-12-29 | 2018-07-09 | 에이치피프린팅코리아 주식회사 | Image forming apparatus and method for image forming |
| JP6663139B2 (en) * | 2017-05-30 | 2020-03-11 | 京セラドキュメントソリューションズ株式会社 | Image forming device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1525257A (en) * | 2003-02-24 | 2004-09-01 | 佳能株式会社 | Image forming apparatus and image forming method |
| CN1979355A (en) * | 2005-12-09 | 2007-06-13 | 株式会社理光 | Image forming apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3604683B2 (en) * | 2002-09-24 | 2004-12-22 | 株式会社リコー | Color image forming apparatus, tandem drum type color image forming apparatus, and process cartridge used in color image forming apparatus |
| JP4899302B2 (en) * | 2004-09-21 | 2012-03-21 | コニカミノルタビジネステクノロジーズ株式会社 | Color image forming apparatus and color image forming method |
| JP2007293047A (en) * | 2006-04-25 | 2007-11-08 | Konica Minolta Business Technologies Inc | Color image forming apparatus and color image forming method |
| JP5196759B2 (en) | 2006-10-13 | 2013-05-15 | キヤノン株式会社 | Image forming apparatus |
| JP5157312B2 (en) * | 2007-08-13 | 2013-03-06 | コニカミノルタビジネステクノロジーズ株式会社 | Image forming apparatus and image forming method |
| JP5472791B2 (en) * | 2009-08-24 | 2014-04-16 | 株式会社リコー | Image forming apparatus |
| JP5145366B2 (en) * | 2010-02-25 | 2013-02-13 | 京セラドキュメントソリューションズ株式会社 | Image forming apparatus and linear velocity measuring method |
| JP5565217B2 (en) * | 2010-08-31 | 2014-08-06 | 株式会社リコー | Optical writing apparatus, image forming apparatus, and optical writing control method |
| JP5606263B2 (en) * | 2010-10-21 | 2014-10-15 | シャープ株式会社 | Color image forming apparatus and color misregistration correction method in color image forming apparatus |
-
2013
- 2013-07-05 JP JP2013141172A patent/JP6057134B2/en active Active
- 2013-08-30 CN CN201310389013.8A patent/CN103676546B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1525257A (en) * | 2003-02-24 | 2004-09-01 | 佳能株式会社 | Image forming apparatus and image forming method |
| CN1979355A (en) * | 2005-12-09 | 2007-06-13 | 株式会社理光 | Image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| US9411253B2 (en) | 2016-08-09 |
| CN103676546A (en) | 2014-03-26 |
| US20140064799A1 (en) | 2014-03-06 |
| JP2014063137A (en) | 2014-04-10 |
| JP6057134B2 (en) | 2017-01-11 |
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